<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>双飞翼布局</title>
</head>
<style>
    html,body{
        height: 100%;
    }
    .left{
        float: left;
        height: 100%;
        width: 200px;
        background-color: red;
    }
    .right{
        float: right;
        height: 100%;
        width: 200px;
        background-color: red;
    }
    .center{
        height: 100%;
        background-color:#ccc;
        margin: 0 200px;
    }

</style>
<body>
    <div class="left"></div>
    <div class="right"></div>
    <div class="center"></div>
    
</body>
</html>